On the Work-Hardening Mechanism of TWIP Steels Strengthened by Nanometre-Sized Vanadium Carbides

摘要：

　　Experiments reveal that while dispersed nanometer-sized vanadium carbides can greatly increase the yield strength of twinning induced plasticity (TWIP) steels,they may cause some reduction of the overall work-hardening rate.A modified physically based model is adopted in the present work to capture the effect of nanometer-sized vanadium carbides on the work-hardening rate of a laboratory FeMnC austenitic TWIP grade.It is found that the introduction of the dispersed nanometer-sized carbides leads to a faster dislocation accumulation rate but reduces the rate of twin formation with strain during plastic deformation.Compared to a reference alloy without precipitates the work-hardening rate is higher at small strains but decreases faster than the reference thus presenting a lower work-hardening rate at high strains.

关键词： TWIP steels Vanadium carbides Work-hardening Dislocation evolution Twinning kinetics

作者: Z.Y. Liang M.X. Huang H.W. Yen C. P. Scott

作者单位: Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,China Australian Centre for Microscopy & Microanalysis,The University of Sydney,NSW,2006,Australia

会议类型: 国际会议

会议名称: The 2nd International Symposium on Automobile Steel (第二届汽车用钢生产及应用技术国际研讨会)

会议地点: 鞍山

会议语种:英文

页码: 113-117

在线出版日期: 2013-05-21（万方平台首次上网日期，不代表论文的发表时间）